problème "La transaction a échoué."

Salut à tous, je travaille dans un environnement eclipse + jboss seam. J'essaie de faire la première page de login.
Voici le code de la page d'authentification :

Code:

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
package org.sotetel.session;
 
import javax.persistence.EntityManager;
import javax.persistence.PersistenceException;
 
import org.jboss.seam.ScopeType;
import org.jboss.seam.annotations.In;
import org.jboss.seam.annotations.Logger;
import org.jboss.seam.annotations.Name;
import org.jboss.seam.annotations.Out;
import org.jboss.seam.log.Log;
import org.jboss.seam.security.Identity;
import org.sotetel.entity.Employe;
 
 
@Name("authenticator")
public class Authenticator
{
    @Logger Log log;
    @In  
    private EntityManager entityManager;
 
    @In Identity identity;
 
    @Out(required=false, scope=ScopeType.SESSION)
     Employe emp;
 
	public boolean authenticate()
    {
        log.info("authenticating #0", identity.getUsername());
        try {
            emp = (Employe) 
                entityManager.createQuery("select e from Employe e where e.nomEmploye = #{identity.username} and e.prenomEmploye = #{identity.password}")       
                             .getSingleResult();
        } catch (PersistenceException e) {
            return false;
        } 
 
 
 
        return true;
    }
}

une fois la page de login chargée, quand j'entre le "nom" et "prenom" je reçois le message d'erreur " la transaction a échouée".

voici les erreurs qui apparaissent sur la console :

Code:

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
.....
01:40:48,765 INFO  [Contexts] starting up: org.jboss.seam.security.identity
01:40:49,234 INFO  [RuleBase] parsing rules: /security.drl
01:41:02,656 INFO  [Authenticator] authenticating chehata
01:41:02,937 INFO  [STDOUT] Hibernate: 
    select
        employe0_.MATRICULE_EMPLOYE as MATRICULE1_35_,
        employe0_.DEBUT_RESPONS_EMPLOYE as DEBUT2_35_,
        employe0_.HANDIC1_EMPLOYE as HANDIC3_35_,
        employe0_.DATE_PERMIS_EMPLOYE as DATE4_35_,
        employe0_.AV_ECHELON_PREV_EMPLOYE as AV5_35_,
        employe0_.TYPE_ARRET_AV_EMPLOYE as TYPE6_35_,
        employe0_.NOM_JF__EMPLOYE as NOM7_35_,
        employe0_.NUM_PERMIS_EMPLOYE as NUM8_35_,
        employe0_.VILLE_EMPLOYE as VILLE9_35_,
        employe0_.CIN_EMPLOYE as CIN10_35_,
        employe0_.SORITE_CAVIS_EMPLOYE as SORITE11_35_,
        employe0_.HANDIC2_EMPLOYE as HANDIC12_35_,
        employe0_.MARCHE_EMPLOYE as MARCHE13_35_,
        employe0_.JEUNE_T_EMPLOYE as JEUNE14_35_,
        employe0_.BANQUE_VIR_EMPLOYE as BANQUE15_35_,
        employe0_.DATE_TITUL_EMPLOYE as DATE16_35_,
        employe0_.FONCTION_EMPLOYE as FONCTION17_35_,
        employe0_.DECLAR_EMPLOYE as DECLAR18_35_,
        employe0_.TEMPS_REDUIT_EMPLOYE as TEMPS19_35_,
        employe0_.CODE_POSTAL_EMPLOYE as CODE20_35_,
        employe0_.PRENOM_EMPLOYE as PRENOM21_35_,
        employe0_.SOLDE_CONGE1_EMPLOYE as SOLDE22_35_,
        employe0_.DECLAR_IMP_EMPLOYE as DECLAR23_35_,
        employe0_.NOM_EMPLOYE as NOM24_35_,
        employe0_.NOM_CONJOINT_EMPLOYE as NOM25_35_,
        employe0_.ADRESSE_EMPLOYE as ADRESSE26_35_,
        employe0_.PERIMETRE_COMMUNAL_EMPLOYE as PERIMETRE27_35_,
        employe0_.SITFAM_EMPLOYE as SITFAM28_35_,
        employe0_.SOLDE_CONGE2_EMPLOYE as SOLDE29_35_,
        employe0_.DATENAISS_EMPLOYE as DATENAISS30_35_,
        employe0_.TELEPHONE_MOBILE_EMPLOYE as TELEPHONE31_35_,
        employe0_.ENTREE_CAVIS_EMPLOYE as ENTREE32_35_,
        employe0_.BUREAU_EMPLOYE as BUREAU33_35_,
        employe0_.FIN_RESPONS_EMPLOYE as FIN34_35_,
        employe0_.SPECIALITE_EMPLOYE as SPECIALITE35_35_,
        employe0_.VOITURE_EMPLOYE as VOITURE36_35_,
        employe0_.ACIEN_CAP_DECES_EMPLOYE as ACIEN37_35_,
        employe0_.NUM_ACC_TRAVAIL_EMPLOYE as NUM38_35_,
        employe0_.NUM_SOCIAL_EMPLOYE as NUM39_35_,
        employe0_.DATE_RECRUT_EMPLOYE as DATE40_35_,
        employe0_.SEXE_EMPLOYE as SEXE41_35_,
        employe0_.SOLDE_REPOS_EMPLOYE as SOLDE42_35_,
        employe0_.SUSPENS_EMPLOYE as SUSPENS43_35_,
        employe0_.DATE_EMPLOI_EMPLOYE as DATE44_35_,
        employe0_.FIN_CONTRAT_EMPLOYE as FIN45_35_,
        employe0_.REGIME_SOCIAL_EMPLOYE as REGIME46_35_,
        employe0_.NATIONALITE_EMPLOYE as NATIONA47_35_,
        employe0_.PRENOM_CONJOINT_EMPLOYE as PRENOM48_35_,
        employe0_.OPERATION_EMPLOYE as OPERATION49_35_,
        employe0_.CHAUFFEUR_EMPLOYE as CHAUFFEUR50_35_,
        employe0_.DEBUT_CONTRAT_EMPLOYE as DEBUT51_35_,
        employe0_.CONJ_ACTIF_EMPLOYE as CONJ52_35_,
        employe0_.TELEPHONE_EMPLOYE as TELEPHONE53_35_,
        employe0_.EMP_MUT_EMPLOYE as EMP54_35_,
        employe0_.SOLDE_CONGE0_EMPLOYE as SOLDE55_35_,
        employe0_.DATE_POSITION_EMPLOYE as DATE56_35_,
        employe0_.ECHELON_EMPLOYE as ECHELON57_35_,
        employe0_.CHEF_FAMILLE_EMPLOYE as CHEF58_35_,
        employe0_.LIEU_EMPLOYE as LIEU59_35_,
        employe0_.NUM_AGENCE_EMPLOYE as NUM60_35_,
        employe0_.CONJ_MUT_EMPLOYE as CONJ61_35_,
        employe0_.EMPLOI_EMPLOYE as EMPLOI62_35_,
        employe0_.NBR_CONTRAT_EMPLOYE as NBR63_35_,
        employe0_.NB_ENFANT_EMPLOYE as NB64_35_,
        employe0_.NIV_INST_EMPLOYE as NIV65_35_,
        employe0_.NUM_COMPTE_EMPLOYE as NUM66_35_,
        employe0_.POSTE_TEL_EMPLOYE as POSTE67_35_,
        employe0_.SIT_MILITAIRE_EMPLOYE as SIT68_35_,
        employe0_.RIB_EMPLOYE as RIB69_35_,
        employe0_.FIN_POSITION_EMPLOYE as FIN70_35_ 
    from
        stest1.employe employe0_ 
    where
        employe0_.NOM_EMPLOYE=? 
        and employe0_.PRENOM_EMPLOYE=?
01:41:03,078 INFO  [lifecycle] WARNING: FacesMessage(s) have been enqueued, but may not have been displayed.
sourceId=null[severity=(INFO 0), summary=(La connexion a échoué.), detail=(La connexion a échoué.)]
sourceId=null[severity=(WARN 1), summary=(La transaction a échoué.), detail=(La transaction a échoué.)]

si quelqu'un peut m'aider. Merci